I've seen/ been:
A cop plant weed on my friend and take him to jail for it.
Assaulted/beaten by police for not talking/ratting out people.
A cop confiscate my weed and say they're keeping for themselves because it looks amazing.
Had over a grand taken while being arrested for possession and not reported.
Had over $1400 taken but only $600 reported for civil asset forfeiture.
1 of the first dealers I ever met was introduced by friends (as in a bunch of 14/15 year olds), and later on we found out he was in the HPD.
Friend shot in a drive by and taken to jail for disturbing the peace.
Got completely fucked up in jail by 2 COs for trying to get one of them to fight me after talking shit about my mom after a visit (17 at the time.)
Had 2 COs watch on as I was being jumped by 3 gang members but managing to not completely get my ass kicked.
My vehicle be searched without my consent after being detained in the back of a squad car, because the cop said "after calling the judge, they said I can search it."
Arrested 7 times in total and not once been read my rights. This one doesn't bother me as much just because cops are fucking shady, and I don't expect them to follow their own rules.
More and a hell of a lot more in court, but this isn't meant to be an exhaustive list, or a misery competition. The main point is that none of the above was done by the same cop, and all but 2 of those were in different jurisdictions. I've overgrown a lot in my teenage/early 20s and can recognize and accept my responsibility, but the state of affairs in law enforcement has not changed. In fact, it's gotten worse as technology has evolved, and cops have to be (most of the time, at least) more careful with cameras everywhere.
Fuck. The. Police. ACAB.